Product Name: Ductile Iron Concentric Butterfly Valve
Size Range: DN50-DN1000
Pressure Ratings: PN10, PN16, PN25
Standards: EN 593, MSS SP-67, API 609, BS 5155
Body Material Options: Ductile Iron, Cast Iron, Cast Steel
Disc Material Options: Nickel Ductile Iron, Aluminum Bronze, Stainless Steel
Seat Material Options: EPDM, NBR, VITON, PTFE
End Connection: Double Flanged
Operation: Worm Gear
Surface Treatment: Epoxy Coated
Source: https://www.landee.cn/ductile-iron-concentric-butterfly-valve-en-593-dn50-dn1000.html
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